Or you can have the best of both worlds. You can full length size your brass to your unique chambers headspace. The below write-up is from the
www.gscustom.co.za site. I can never find it on their website, it is well hidden, so I put it into MS Word so I can lay my hands on it.
Italicized text is my opinion.
It is very common that the sizing die is not set up to match the individual rifle chamber. This leads to all manners of difficulty like the ammunition displaying signs of overpressure while speeds are below maximum or the case necks tearing on firing.
There are many recommendations and apparent fix’s like neck sizing, increasing or reducing crimp, blaming the cases for either being too old or to new, rejecting specific brands of brass as being not suitable are all symptoms of a poorly setup sizing die.
Here is what must be done and must be followed to the letter, do not omit any step. The setup is a system much like a recipe. Miss one of the ingredients or steps and the recipe will fail.
1. Always use the same shell holder with the same sizing die.
2. Ensure that the cases are within the length specifications.
3. Insert the sizing die and screw it down until it lightly touches the shell holder when in the highest position.
4. Lubricate a case and size it.
5. Thoroughly clean the case of all lubricant and chamber the case. Mauser type actions will require that insert the case into the magazine so that the slot extractor claw can pick the case up for chambering.
6. If the bolt cams over as if there is nothing in the chamber then stick a layer of masking tape to the base of the case and repeat the exercise. If the bolt cams over hard then you will need to remove a layer from the top of the case.
7. Continue to add masking tape until you feel drag on the bolt on closing and that there are clear indications that the bolt is placing pressure on the masking tape.
I remove the firing pin from the bolt so that I can feel the cam over pressure, the force required to compress the firing pin spring I believe overrides ones “feel”.
8. Measure the combined thickness of the layers of masking tape and set the sizing die away from the shell holder by the same amount. Use a feeler gauge to get the correct distance.
9. Lock the die in position and never set the die again for that specific rifle.
The general idea is to duplicate the distance between the shoulder of the specific rifle chamber and the slot face with the shell holder and sizing die. If you do not have dies with lock rings fitted with lock screws then sell the die set to someone you don’t like and get the right dies.
It will be necessary to fire form all cases once before the effect of the new and correct settings are realised. Do not reset the sizing die. New cases must be sized before loading. Do not reset the sizing die.
When the bolt closing resistance get too stiff on closing then it is either time to trim to length or to anneal case necks. Do not reset the sizing die.
All my calibres are set this way.